The failure of reference, in the assignment contract, of the territorial extend for which the economic rights have been assigned to carry out any act of use of economic rights, is considered as limiting the assignment to the country in which the assignment contract is granted. The failure of reference, in the assignment contract, of scope and means of use for which the economic rights have been assigned to carry out any act of use of economic rights, is considered as limiting the assignment to the scope and the necessary means of use so as required to meet purposes and goals considered at the time assignment contract was concluded. The assignment contract shall contain the mode of remuneration for the author in accordance with the use made to his work. The rights that the author does not mention in the contract are expressly reserved to him or her or her. Article 231: Transfer of originals or of copies of work, assignment and license concerning rights on works Where the author transmits by gift the original or a copy of his or her work, he is not deemed of having assigned his or her economic rights, except otherwise stipulated on the contract, or having granted license for carrying out any acts concerned by his or her economic rights. Notwithstanding provisions of the paragraph one of this article, the legitimate holder of an original or a copy of the work shall enjoy the right of presentation of this original or copy to the public, except otherwise stipulated in the contract. The right referred to in paragraph two(2) of the this article shall not be extended persons who are in possession of original or of copies of a work by means of renting or any other means without having acquired the property of it. SECTION 6: CONCESSION OF THE RIGHTS LICENSE Article 232: License of rights inclusive The author of a work may grant, by contract arrangement, license to any physical person or legal entity to carry out any act of economic rights use. The license may be exclusive or no exclusive. The license contract shall be valid only if it is made in writing and signed by parties to the contract. The license contract shall indicate in explicit manner that the license is exclusive or non exclusive. Article 233: The license contract on economic rights of a work The license contract of economic rights to carry out any act of economic rights use shall be limited to certain acts and specific kind of use or include certain restrictions to the plan of purposes, the aim of the exploitation, the duration of use, the scope and territorial extend and the means of use.